Mixxx is software for DJs that provides everything needed to create live mixes. It allows you to beatmatch songs and crossfade them together, like you would with turntables and a mixer. It runs without any extra hardware, and offers a wide range of advanced features including comprehensive MIDI controller and vinyl control support. To obtain the lowest latency and highest responsiveness, it uses hardware video acceleration and takes advantage of multi-core CPUs.

Automatous Monk is an application that maps cellular automaton evolutions into music. The resulting music is represented as jMusic scores that can be played and saved as MIDI files. A real-time version is also available.

Tablatures is a guitar tablature editor.
Tablatures is compatible with PowerTab, which is a
well-known and widely adopted tablature editor for
Windows systems. You can easily find thousands of
song transcriptions in this format on the
Internet.

Album Art Downloader is a class that can be used
to retrieve music album images from Amazon.com. It
uses the Web services API, retrieves the image
files into a local server directory, and stores
the image file names in a MySQL database.

pulpTunes is a Web server for the iTunes, letting you access your music through the Web. It runs on Windows and Mac, and even any other platform like Linux, provided you have an
iTunes-like XML library file that points at the path of your music files.

localcast is designed for Mac users who want to be
able to resume podcast downloads after an error or
unexpected sleep, something that iTunes cannot do
by itself. Systems without iTunes can use localcast as an alternative to bashpodder.
localcast depends on Mac OS X personal Web
sharing and on wget. With localcast, interrupted
downloads can be resumed, because wget fetches the
podcasts. Podcasts appear fully integrated in
iTunes just as if localcast was not in use.

Pyjama is an (unofficial) client for Jamendo, the
free music community. It helps you to browse
through Jamendo's database in order to find new
albums. You can stream the music, create
playlists, sort the albums by rating and tag, rate
each track, and star albums you like most. An
integrated Firefox instance helps you to interact
with the Jamendo community.